I think it all depends on what kind of terrain you like to ski. If you like mostly groomers, then the place is tough to beat. There is also plenty of moguls, and the bowls are nicely arranged, they start off easy to the far left and get progressively harder as you move to the right. Not enough tree skiing for my liking, but I could be happy there for four or five days. You could also spend a day snowshoeing, which we did while we were there, and there is loads of cross country skiing to be had if you're into that. If you ski a lot at Killington as I do, then you can judge skiable acreage by comparing the two. Killington claims to have a little over one thousand skiable acres, while Sun Valley has about twice that. However, a lot of SV's acreage is made up of bowl skiing, so the numbers can be a little bit decieving. We found that it was a great place to visit, well worth going to. The town of Ketchem is a lot of fun without being crowded or stuffy.